Perhaps you should try some spelling variations:
"lang nghe cnc snippets" » "cong nghe cnc snippets", "van nghe cnc snippets", "lang nghe cong snippets", "lang nghe che snippets", "lang nghe co snippets"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("lang nghe cnc snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lang nghe cnc snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lang nghe cnc snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lang nghe cnc snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.